Fish have a single kidney which is the same length as the coelom. It can be divided up into cranial and caudal parts; the cranial part has endocrine and haematopoietic functions and the caudal is where filtration occurs. It is not uncommon for some species to have no glomeruli however as a rule freshwater fish have larger glomeruli is greater numbers. Some species also have renal portal veins. | Fish have a single kidney which is the same length as the coelom. It can be divided up into cranial and caudal parts; the cranial part has endocrine and haematopoietic functions and the caudal is where filtration occurs. It is not uncommon for some species to have no glomeruli however as a rule freshwater fish have larger glomeruli is greater numbers. Some species also have renal portal veins. |